New Good Install – Monitor Now Blank?

I just finished installing Ubuntu Server 12.04.1 on a new Pavilion p6-2117c desktop.
The install went good. I believe the install formatted the full hard drive. Therefore, Windows 7 is off.
When the install was finished, it rebooted and dropped me off at the user prompt. I performed ls –l and everything looked good. I left the system for about an hour and came back.

The monitor LED light is flashing and I see nothing on the screen. So I typed some keys to awake, still nothing.

I power on and off the monitor and it shows as if it is fine.

WHAT IS THE PROBLEM?

THANKS